Roman shade
US5129440A · kind A · utility
81Cited by
10References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 9, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | May 9, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved expandable and contractible window covering comprising an assembly of elongated cells is disclosed. Each cell is formed by folding a strip of material and joining an edge to the next adjacent cell. The rear wall of the cell comprises less material than the hanging front wall flap of the cell, and the material of the cell is chosen to be relatively soft and flexible, so that the hanging front wall flap of each cell droops downwardly at least to the juncture with the adjacent lower cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.